https://stream.echo6.co/videos/watch/d1161624-7b9b-4d27-8357-e70a438a7619 Very few people use HF FM even though it's easy to generate. It's not a QRP mode as it's less efficient than SSB or DSB. But if signals are strong the audio quality can be excellent. This video describes a frequency agile 2 transistor exciter using a 7.2 MHz ceramic resonator. See my previous video (Frequency modulating a crystal oscillator for 147 MHz FM) for more information on the circuit. It could be used as the basis of a transmitter for 7 MHz FM experiments (best during the day as there's less interference). You may even be able to link it to a VHF or UHF FM rig to make a crossband repeater. PS: If you liked this video please consider supporting Amateur Radio VK3YE by: Subscribing on YouTube,, Checking my books page at https://books.vk3ye.com, Shopping on Amazon via: https://amzn.to/3iiDQXv, or, Shopping on eBay via: https://ebay.us/i9DuWP (then if you buy something I'll get a small commission at no cost to you) Sat, 13 Jun 2026 18:03:31 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/d1161624-7b9b-4d27-8357-e70a438a7619 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.